Cluster at the Magnetospheric Cusps

Cargill, P. J.; Lavraud, B.; Owen, C. J.; Grison, B.; Dunlop, M. W.; Cornilleau‐Wehrlin, N.; Escoubet, C. P.; Paschmann, G.; Phan, T. D.; Rezeau, Laurence; Bogdanova, Y. V.; Nykyri, K.

doi:10.1007/1-4020-4582-4_10

Cited by 14 publications

(13 citation statements)

References 92 publications

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“…2. and also Cargill et al (2005); Grison et al (2005)). Smaller scale velocity fluctuations re-appear at about 05:35 UT and persist throughout the rest of the interval.…”

Section: Total Integrated Power Of Magnetic Field Fluctuationsmentioning

confidence: 89%

“…The first harmonic of the fundamental frequency is also observable from both FGM and STAFF. Because of the better sensitivity at higher frequencies, STAFF can also detect the 2nd, 3rd and 4th harmonics (see also Cargill et al, 2005).…”

Section: Analysis Methods Of Cusp Magnetic Field Fluctuationsmentioning

confidence: 99%

“…Cluster has revealed for the first time many important aspects of the structure of the high-altitude cusps, and especially how they are related to the prevailing solar wind conditions (e.g. Cargill et al, 2005;. In particular, it is becoming apparent that the orientation of the Interplanetary Magnetic Field (IMF) plays a pivotal role.…”

Section: Introductionmentioning

confidence: 99%

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Origin of the turbulent spectra in the high-altitude cusp: Cluster spacecraft observations

et al. 2006

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Abstract. High-resolution magnetic field data from Cluster Flux Gate Magnetometer (FGM) and the Spatio-Temporal Analysis of Field Fluctuations (STAFF) instruments are used to study turbulent magnetic field fluctuations during the highaltitude cusp crossing on 17 March 2001. Despite the quiet solar wind conditions, the cusp was filled with magnetic field turbulence whose power correlates with the field-aligned ion plasma flux. The magnetic field wave spectra shows power law behavior with both double and single slopes with break in the spectra usually occurring in the vicinity of the local ion cyclotron frequency. Strong peaks in the wave power close to local ion cyclotron frequency were sometimes observed, with secondary peaks at higher harmonics indicative of resonant processes between protons and the waves. We show that the observed spectral break point may be caused partly by damping of obliquely propagating kinetic Alfvén (KAW) waves and partly by cyclotron damping of ion cyclotron waves.

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“…2. and also Cargill et al (2005); Grison et al (2005)). Smaller scale velocity fluctuations re-appear at about 05:35 UT and persist throughout the rest of the interval.…”

Section: Total Integrated Power Of Magnetic Field Fluctuationsmentioning

confidence: 89%

Section: Analysis Methods Of Cusp Magnetic Field Fluctuationsmentioning

confidence: 99%

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Origin of the turbulent spectra in the high-altitude cusp: Cluster spacecraft observations

et al. 2006

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“…Though the CMEs started with a weak front end, its impact compressed and deformed the magnetosphere such that Cluster, which was in the southern magnetospheric lobe, suddenly found itself in the magnetosheath. Such compressions of the magnetopause by comparatively small changes in the solar wind pressure have been reported earlier (e.g., Cargill et al, 2005;Balan et al, 2006). While Cluster was crossing the compressed magnetosheath under steady solar wind pressure and steady velocity components, IMF B y became zero for about 1.5 h when the magnetosphere shifted back to the Cluster position.…”

Section: Discussionmentioning

confidence: 72%

Magnetosphere–ionosphere coupling during the CME events of 07–12 November 2004

Balan

Alleyne

Walker

et al. 2008

Journal of Atmospheric and Solar-Terrestrial Physics

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“…ion average energy decreases with decreasing latitude, is understood as a consequence of the reconnection poleward of the cusp, and hence is regarded as a typical ion feature in northward-IMF cusp [20,21]. Variations of the reconnection at the magnetopause sometimes could induce dispersion structures in the cusp [22][23][24], such as the "saw tooth" dispersion and "cusp ion step".…”

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confidence: 98%

Cluster observations of high-altitude cusp during multiple fast-turning IMF

Cai

Dunlop

et al. 2010

Chin. Sci. Bull.

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Using coordinated observations from the Cluster, DMSP and ESR radar, high-altitude cusp was investigated for a time period characterized by four fast reversals of the IMF B Z . On February 12, 2003, Cluster was flying sunward at duskside over the Northern Hemisphere, across the high-altitude northern cusp twice. Both the two crossings are during steady northward IMF interval, whereas ion fluxes detected during the time period are quite different. The cusp in the first crossing is a "typical" northward-IMF one, with short-lived ion injections of evident "reversed" dispersion signatures. In the second crossing, however, the cusp appears to be a region reminiscent of the Stagnant Exterior Cusp (SEC). In addition, evident upward-flowing O + ion bursts, possibly original from polar ionosphere, are also detected during the second cusp crossing, together with enhancement of trapped magnetospheric-like electron fluxes. We suggest that the SEC-like cusp is likely on newly closed field lines, which were first reconnected (being opened) at low latitudes and later reconnected again (being closed) poleward of the northern cusp. Stagnant Exterior Cusp, magnetic reconnection, interplanetary magnetic field, Cluster Citation:Cai H T, Ma S Y, Dunlop M W, et al. Cluster observations of high-altitude cusp during multiple fast-turning IMF.

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Cluster at the Magnetospheric Cusps

Cited by 14 publications

References 92 publications

Origin of the turbulent spectra in the high-altitude cusp: Cluster spacecraft observations

Origin of the turbulent spectra in the high-altitude cusp: Cluster spacecraft observations

Magnetosphere–ionosphere coupling during the CME events of 07–12 November 2004

Cluster observations of high-altitude cusp during multiple fast-turning IMF

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